Bicycle frame



FIG. 1 is a left side view of a bicycle frame, showing my new design in position of use on a bicycle.

FIG. 2 is a right side view of the bicycle frame.

FIG. 3 is a back view of FIG. 2.

FIG. 4 is a front view of FIG. 2.

FIG. 5 is a top view of FIG. 2; and,

FIG. 6 is a bottom view of FIG. 2.

The portions of a bicycle shown in broken lines in FIGS. 1–6 form no part of the claimed design. The broken lines immediately adjacent the shaded areas represent the boundaries of the claimed design and form no part of the claimed design. 

The ornamental design for a bicycle frame, as shown and described. 